Section 01 ENGINES (1503 4-TEC)
Subsection 06 (CYLINDER HEAD)
1
R1503motr91A
2
1. Rocker arm shaft
2. Rocker arm shaft notches
Install NEW rocker arm shaft screws
no. 8
.
Torque as per following procedure:
CAUTION:
This assembly uses stretch screws.
As the screws have been stretched from the
previous installation, it is very important to use
new screws at assembly. Failure to replace
screws and to strictly follow the torque proce-
dure may cause screws to loosen and lead to
engine damage.
– Torque screws at first to 10 N•m (89 lbf•
in
)
according to following sequence.
R1503motr93A
2
1 3
4
5
6
– Torque screws to 20 N•m (177 lbf•
in
).
– Finish tightening screws turning an additional
90° rotation with a torque angle gauge.
1
R1503motr92A
2
1. Rocker arm shaft screw
2. Torque angle gauge
CAMSHAFT TIMING GEAR
NOTE:
Although it is not necessary to position
crankshaft to TDC for disassembly, it is a good
practice to do it, as a troubleshooting step, to
know before disassembly if valve timing was ap-
propriate.
Removal
Lock crankshaft with crankshaft locking tool
(P/N 529 035 821), refer to CYLINDER BLOCK
section.
Remove:
– valve cover (refer to CYLINDER BLOCK section)
– chain guide
no. 12
– Allen screws
no. 13
– camshaft timing gear
no. 14
.
NOTE:
Secure timing chain
no. 15
with a retaining
wire.
Inspection
Check camshaft timing gear for wear or deteriora-
tion.
If gear is worn or damaged, replace it as a set
(camshaft timing gear and timing chain).
For crankshaft timing gear, refer to CYLINDER
BLOCK section.
Installation
For installation, reverse the removal procedure.
Pay attention to the following details.
76
smr2005-036
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Содержание Rotax 1503 4-Tec 2005
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Страница 2: ...2005 Engine Shop Manual ROTAX 1503 4 TEC ENGINES www SeaDooManuals net ...
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